Thank you. I've been working on getting a toy/game of mine wired, and I had no idea LEDs have positive and negative leads. This explains a big part of why I haven't been able to get them lighting up. If you don't mind, can I ask something? If have a series of 7 LEDs, 2.8 volts each, how much battery power do I need to get them going? And how many ohms of resistance? The internet math I have come across suggests 18V with 40 ohms resistance, but I can't find a 40 ohm resistor.
For my Social Science (class IX) before this I made a chart but my sir rejected that and give me 2 days for preparing another model and I found this video and this is my new model. By the way thank you for making video.